I too like this idea, but am not sure why 'advertising' your app to the community would be such a bad thing to do. I'm an individual developer, working from home and with limited resources. My biggest challenge when my app is ready for prime time will be getting the word out.
Perhaps it wouldn't be such a bad thing to have a group of RMers that help promote each other's apps, but in an honest and genuine way (if you don't like something, you should say that). I often come across great products through "community chat" and benefit from it.